Analysis of Soil Salinization in the Southern Laizhou Bay Based on GIS

The spatial variability of soil salinity in the southern Laizhou Bay is investigated by using GIS technology and geostatistics.The variation coefficients of soil salinity indicate that the variability of soil salinity is strong in the surface and bottom soil layers and moderate in the other layers.The soil salinity is relatively higher and the area of salinized soil is relatively larger in the whole area studied.The distribution of soil salinity is in good coincidence with an index model in all soil layers but layers of 10~20 cm and 80~100 cm in which the soil salinity distribution is in coincidence with a spherical model.The salt content in different soil layers in the study area shows a significant spatial variability.A strong spatial variability of soil salinity occurs in the layers of 60~80 cm and 80~100 cm and a moderate one in the other layers.These results can provide a theory basis for the planning,agricultural production and entironment maintenance in the area studied.